CN115960491A - Ink, OLED device and display panel - Google Patents
Ink, OLED device and display panel Download PDFInfo
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- CN115960491A CN115960491A CN202211627645.9A CN202211627645A CN115960491A CN 115960491 A CN115960491 A CN 115960491A CN 202211627645 A CN202211627645 A CN 202211627645A CN 115960491 A CN115960491 A CN 115960491A
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- 239000002904 solvent Substances 0.000 claims abstract description 74
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 18
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 12
- 125000004185 ester group Chemical group 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims description 25
- QPJVMBTYPHYUOC-UHFFFAOYSA-N methyl benzoate Chemical compound COC(=O)C1=CC=CC=C1 QPJVMBTYPHYUOC-UHFFFAOYSA-N 0.000 claims description 20
- LTEQMZWBSYACLV-UHFFFAOYSA-N Hexylbenzene Chemical compound CCCCCCC1=CC=CC=C1 LTEQMZWBSYACLV-UHFFFAOYSA-N 0.000 claims description 12
- XSIFPSYPOVKYCO-UHFFFAOYSA-N butyl benzoate Chemical compound CCCCOC(=O)C1=CC=CC=C1 XSIFPSYPOVKYCO-UHFFFAOYSA-N 0.000 claims description 12
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 12
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- HHNHBFLGXIUXCM-GFCCVEGCSA-N cyclohexylbenzene Chemical compound [CH]1CCCC[C@@H]1C1=CC=CC=C1 HHNHBFLGXIUXCM-GFCCVEGCSA-N 0.000 claims description 10
- 229940095102 methyl benzoate Drugs 0.000 claims description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 9
- 239000008096 xylene Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000007639 printing Methods 0.000 abstract description 18
- 239000003960 organic solvent Substances 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000007641 inkjet printing Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- -1 small-molecule organic compound Chemical class 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000012046 mixed solvent Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000059 patterning Methods 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000002207 thermal evaporation Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000009777 vacuum freeze-drying Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Electroluminescent Light Sources (AREA)
Abstract
The application provides an ink, OLED device and display panel, the ink includes: the organic solvent-based organic solvent composition comprises a first solvent, a second solvent and a solute, wherein the first solvent is a compound containing a phenyl group and an ester group, the second solvent is a compound containing a phenyl group, and the solute is an organic compound. The ink provided by the application has good printing performance and stability, and the performance of the OLED device can be improved by adopting the ink to form the light emitting layer of the OLED device.
Description
Technical Field
The application relates to the technical field of display, in particular to ink, an OLED device and a display panel.
Background
Organic Light Emitting Diodes (OLEDs) have the advantages of high contrast, wide color gamut, wide viewing angle, fast response speed, and flexible display, and are considered to be the most potential next-generation flat panel display technology. At present, commercial OLED display screens are mainly prepared by a high vacuum thermal evaporation method, but the high vacuum thermal evaporation method needs a fine mask, a large amount of OLED materials are wasted, and the cost for preparing large-size panels is very high.
In order to reduce the manufacturing cost, the ink-jet printing display technology provides an effective way for preparing large-size OLED products at low cost, the ink-jet printing display technology can adjust the thickness of the light-emitting layer of each pixel, RGB is optimized respectively, the material utilization rate is greatly improved, large-size products can be prepared, high-vacuum equipment is not needed, and the equipment and material cost can be effectively reduced.
In the ink-jet printing display technology, the components of the ink play a decisive role in the quality of printing, wherein the selection of the ink solvent plays a crucial role in directly influencing the performance of the printing layer and further influencing the performance of the whole OLED device, so that finding a proper solvent becomes the key for developing ink with good performance.
Disclosure of Invention
In view of the above, the present application provides an ink and an OLED device, where the ink has good printability and stability, and when the ink is used to form a light emitting layer of the OLED device, the performance of the OLED device can be improved.
In a first aspect, the present application provides an ink comprising: the organic solvent-based organic solvent composition comprises a first solvent, a second solvent and a solute, wherein the first solvent is a compound containing a phenyl group and an ester group, the second solvent is a compound containing a phenyl group, and the solute is an organic compound.
In an alternative embodiment of the present application, the first solvent is at least one of methyl benzoate, ethyl benzoate, and butyl benzoate.
In an alternative embodiment of the present application, the second solvent is at least one of xylene, chlorobenzene, cyclohexylbenzene, and hexylbenzene.
In an alternative embodiment of the present application, the solute is an organic light emitting material.
In an alternative embodiment of the present application, the chemical formula of the solute is:
in an alternative embodiment of the present application, the concentration of the ink is in the range of 8mg/mL to 12mg/mL.
In an alternative embodiment of the present application, the viscosity of the ink is in the range of 4Pa.s to 10Pa.s.
In an alternative embodiment of the present application, the ink has a surface tension in the range of 28N/m to 40mN/m.
In a second aspect, the present application provides an OLED device comprising:
a substrate;
the first electrode layer is arranged on the substrate;
a second electrode layer disposed opposite to the first electrode layer; and
a light emitting layer between the first electrode layer and the second electrode layer;
wherein the light emitting layer is formed by curing the ink as described above.
In a third aspect, the present application provides a display panel comprising an OLED device as described above.
The application provides an ink, OLED device and display panel, the ink of this application uses organic compound as the solute, and the collocation contains the compound of phenyl and ester group as first solvent to and contain the compound of phenyl as the second solvent, first solvent is used for adjusting the viscosity of ink, the second solvent is used for adjusting the surface tension of ink. The ink obtained by dissolving the organic compound solute by matching the first solvent and the second solvent has good viscosity and surface tension, and can meet the requirements of ink-jet printing; when the ink is used for ink-jet printing of the light-emitting layer of the OLED device, the ink has good printing performance and stability, and the performance of the OLED device can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a printed picture of a luminescent layer of an ink provided in an embodiment of the present application.
Fig. 2 is a drop printed picture of an ink provided by an embodiment of the present application.
Fig. 3 is a schematic structural diagram of an OLED device provided in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must include a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically defined otherwise.
The present application may repeat reference numerals and/or letters in the various implementations, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various implementations and/or configurations discussed.
The ink and the OLED device provided in the present application will be described in detail with reference to the following embodiments and accompanying drawings.
The present application provides an ink comprising: the solvent-based coating comprises a first solvent, a second solvent and a solute, wherein the first solvent is a compound containing phenyl and an ester group, the second solvent is a compound containing phenyl, and the solute is an organic compound.
In this application, the first solvent and the second solvent are matched to dissolve the solute to obtain the ink, and the ratio of the first solvent, the second solvent and the solute is adjusted to obtain the ink with proper viscosity and surface tension for printing, wherein the first solvent is used for adjusting the viscosity of the ink, and the second solvent is used for adjusting the surface tension of the ink.
The ink solute is an organic compound, particularly relates to a small-molecule organic compound, and is matched with a compound containing phenyl and an ester group to serve as a first solvent and a compound containing phenyl to serve as a second solvent, wherein the ink obtained by dissolving the small-molecule organic compound solute by the first solvent and the second solvent has good viscosity and surface tension, and can meet the requirements of ink-jet printing.
Further, the first solvent may be at least one of methyl benzoate, ethyl benzoate, and butyl benzoate.
Further, the second solvent may be at least one of xylene, chlorobenzene, cyclohexylbenzene, and hexylbenzene.
Further, the solute is an organic light-emitting material and is used for printing a light-emitting layer of the OLED device. Preferably, the solute is a small-molecule organic light-emitting material.
Further, the chemical structure of the solute may be:
the compound is a micromolecular organic compound, can be used as an organic light-emitting material of a light-emitting layer of an OLED device, and has a good light-emitting effect.
Further, the concentration range of the ink is 8mg/mL-12mg/mL. When the concentration of the ink is too low, the thick film thickness can not be achieved once during ink-jet printing, and the corresponding film thickness requirement can be achieved only by ink-jet printing for multiple times; when the ink density is too high, the viscosity of the ink is affected by the increase in the ink density, and the printing performance of the ink is affected. Experiments prove that the ink has good printing performance when the concentration range is 8-12 mg/mL.
The concentration of the ink is the ratio of the mass of the solute to the volume of the solvent, and for example, a concentration of 8mg/mL indicates that 1mL of the solvent contains 8mg of the solute.
Further, the viscosity range of the ink is 4Pa.s-10Pa.s, and the surface tension range of the ink is 28N/m-40mN/m. The viscosity of the ink is directly measured by a viscosity measuring instrument, and the surface tension of the ink is directly measured by a surface tension measuring instrument.
The printing performance of the ink is mainly determined by the viscosity and the surface tension of the ink, and the ink cannot be easily printed due to too large or too small viscosity and surface tension of the ink. And different solutes and different substrates have different requirements on the viscosity and surface tension of the ink, and the components and proportion of the solvent are required to be adjusted according to actual conditions.
The ink provided by the present application will be described in detail below with reference to specific embodiments and the accompanying drawings.
Example 1
1. The ink formula comprises:
the solute is
The solvent is methyl benzoate and cyclohexylbenzene.
2. The preparation method comprises the following steps:
adding 2mL of methyl benzoate and 8mL of cyclohexylbenzene into a sample bottle, uniformly mixing to obtain a mixed solvent, then adding 90mg of solute into the mixed solvent, heating at 100 ℃, and stirring until the solute is completely dissolved to obtain an ink solution.
3. Evaluation of ink printability and stability
The prepared ink is used for an ink-jet printer to print a light-emitting layer of an OLED device, and printed pictures shot by the ink-jet printer with a camera are shown in figures 1 and 2.
As shown in fig. 1, the oval area in the figure is a pixel area, the black filling portion is a pixel area printed by using the ink of this embodiment, and the portion not filled with color is a pixel area not printed by using the ink of this embodiment, as can be seen from fig. 1, in the pixel area printed by using the ink of this embodiment, the black ink reaches the corresponding pixel area, there is no deviation, and there is no ink overflow over the pixel area, and the ink spreads over the entire pixel area. This determines that the ink printing performance is good.
As shown in fig. 2, the two black dots in the middle row are the positions of the nozzles, and the two black dots in the lower row are the positions of the ejected ink, so that the ejected ink has no satellite droplets, has no random ejection phenomenon, and has no deviation from the positions of the nozzles, and thus, the ink can be controlled to be printed at a designated position. From this, the ink stability was judged to be good.
Example 2
1. The ink formula comprises:
the solute is
The solvent is methyl benzoate, xylene and cyclohexylbenzene.
2. The preparation method comprises the following steps:
adding 2mL of methyl benzoate, 1mL of xylene and 7mL of cyclohexylbenzene into a sample bottle, uniformly mixing to obtain a mixed solvent, then adding 90mg of solute into the mixed solvent, heating at 100 ℃, and stirring until the solute is completely dissolved to obtain an ink solution.
In the actual printing process, different ink formulas are needed to be used for different substrates, some substrates require high ink viscosity, and some substrates require low ink viscosity. When the ink is not easy to spread on the substrate, some solvent with small surface tension needs to be added to reduce the surface tension of the ink, so that the ink is easy to spread on the substrate and has good printing performance, and therefore, the components and the proportion of the solvent need to be adjusted according to actual conditions.
The present application also provides an OLED device comprising:
a substrate;
the first electrode layer is arranged on the substrate;
a second electrode layer disposed opposite to the first electrode layer;
a light emitting layer between the first electrode layer and the second electrode layer;
wherein the light emitting layer is formed by curing ink. The ink includes: the organic solvent-based organic solvent composition comprises a first solvent, a second solvent and a solute, wherein the first solvent is a compound containing a phenyl group and an ester group, the second solvent is a compound containing a phenyl group, and the solute is an organic compound.
Further, the first solvent may be at least one of methyl benzoate, ethyl benzoate, and butyl benzoate.
Further, the second solvent may be at least one of xylene, chlorobenzene, cyclohexylbenzene, and hexylbenzene.
Further, the solute is an organic light emitting material. Preferably, the solute is a small-molecule organic light-emitting material.
Further, the chemical structure of the solute may be:
the compound is a micromolecular organic compound, can be used as an organic light-emitting material of a light-emitting layer of an OLED device, and has a good light-emitting effect.
Further, the concentration range of the ink is 8mg/mL-12mg/mL. When the concentration of the ink is too low, the thick film thickness can not be achieved once during ink-jet printing, and the corresponding film thickness requirement can be achieved only by ink-jet printing for multiple times; when the ink density is too high, the increase in the ink density affects the viscosity and thus the printing performance of the ink. Experiments prove that the ink has good printing performance when the concentration range is 8-12 mg/mL.
Further, the viscosity range of the ink is 4Pa.s-10Pa.s, and the surface tension range of the ink is 28N/m-40mN/m. The viscosity of the ink is directly measured by a viscosity measuring instrument, and the surface tension of the ink is directly measured by a surface tension measuring instrument.
The printing performance of the ink is mainly determined by the viscosity and the surface tension of the ink, and the ink cannot be easily printed due to too large or too small viscosity and surface tension of the ink. And different solutes and different substrates have different requirements on the viscosity and surface tension of the ink, and the components and proportion of the solvent are required to be adjusted according to actual conditions.
Further, the first electrode layer may be an anode layer, and the second electrode layer may be a cathode layer.
Further, the OLED device also comprises a pixel defining layer, wherein the pixel defining layer is positioned on one side of the substrate; the pixel defining layer includes a pixel opening exposing the first electrode layer; the light emitting layer is positioned in the pixel opening and positioned on the first electrode; the second electrode layer is positioned on the light-emitting layer and the pixel defining layer;
the OLED device provided in the present application will be described in detail with reference to specific embodiments and accompanying drawings.
Fig. 3 is a schematic structural diagram of an OLED device according to an embodiment of the present disclosure.
The OLED device includes: a substrate 1, an anode layer 2, a pixel defining layer 3, a light emitting layer 4 and a cathode layer 5. The anode layer 2 is positioned on one side of the substrate 1; the pixel defining layer 3 is positioned on one side of the substrate 1; the pixel defining layer 3 includes a pixel opening exposing the anode layer 2; the light-emitting layer 4 is positioned in the pixel opening and positioned on the anode layer 2; the cathode layer 5 is arranged on the light-emitting layer 4 and the pixel defining layer 3;
wherein the light-emitting layer 4 is formed by curing an ink including a first solvent, a second solvent, and a solute;
the first solvent is at least one of methyl benzoate, ethyl benzoate and butyl benzoate, the second solvent is at least one of dimethylbenzene, chlorobenzene, cyclohexylbenzene and hexylbenzene,
the solute is an organic small molecule compound
The concentration range of the ink is 8mg/mL-12mg/mL;
the viscosity range of the ink is 4Pa.s-10Pa.s, and the surface tension range of the ink is 28N/m-40mN/m.
The application also provides a preparation method of the OLED device, which comprises the following steps:
providing a substrate;
forming a first electrode layer on the substrate;
forming a pixel defining layer on the substrate, and forming a pixel opening on the pixel defining layer, the pixel opening exposing the first electrode layer;
ink is dripped into the pixel opening through ink-jet printing and is solidified to form a light-emitting layer, and the light-emitting layer is positioned on the first electrode layer;
and forming a second electrode layer on the light-emitting layer and the pixel defining layer.
The ink comprises a first solvent, a second solvent and a solute, wherein the first solvent is a compound containing phenyl and an ester group, the second solvent is a compound containing phenyl, and the solute is an organic small molecule compound.
The method for manufacturing the OLED device provided herein will be described in detail with reference to specific examples.
Specifically, the preparation method of the OLED device comprises the following steps:
s1, forming a first metal layer on a substrate 1 by adopting a deposition process such as sputtering, and patterning the first metal layer to form a pattern of an anode layer 2.
The substrate 1 may be a rigid substrate made of glass or the like, or a flexible substrate made of polyester or the like.
The anode layer 2 is made of inorganic metal oxide (e.g., ITO, znO, etc.), organic conductive polymer, or high work function metal material (e.g., au, cu, ag, pt, etc.).
S2, depositing a pixel defining layer film layer on the substrate 1 and the anode layer 2, patterning the pixel defining layer film layer, and forming a pixel opening on the pixel defining layer film layer to form the pixel defining layer 3, wherein the pixel opening exposes the anode layer 2.
The Deposition method of the pixel defining layer may be a Chemical Vapor Deposition (CVD) process, and the pixel defining layer 3 may be made of silicon oxide or silicon nitride.
And S3, printing ink in the pixel opening through ink-jet printing, solidifying the ink in the pixel opening through a vacuum freeze drying process to form a light-emitting layer 4, wherein the light-emitting layer 4 is positioned on the anode layer 2.
An ink preparation step is further included before step S3, the ink preparation step including:
and mixing the solute with a first solvent and the second solvent to form ink to be dripped, and placing the prepared ink in an ink box of an ink-jet printer for printing the luminescent layer.
Wherein the chemical structural formula of the solute is
The first solvent is at least one of methyl benzoate, ethyl benzoate and butyl benzoate;
the second solvent is at least one of xylene, chlorobenzene, cyclohexylbenzene and hexylbenzene.
The concentration range of the ink is 8mg/mL-12mg/mL.
The viscosity range of the ink is 4Pa.s-10Pa.s, and the surface tension range of the ink is 28N/m-40mN/m.
And S4, forming a cathode layer 5 on the light-emitting layer 4 and the pixel defining layer 3 by adopting a vacuum evaporation process.
The cathode layer 5 is made of lithium, magnesium, calcium, strontium, aluminum, indium and the like or an alloy of the above metals and copper, gold and silver.
The present application also provides a display panel including the OLED device as described above.
The application provides an ink, OLED device and display panel, the ink of this application uses organic compound as the solute, and the collocation contains the compound of phenyl and ester group as first solvent to and contain the compound of phenyl as the second solvent, first solvent is used for adjusting the viscosity of ink, the second solvent is used for adjusting the surface tension of ink. The ink obtained by dissolving the organic compound solute by matching the first solvent and the second solvent has good viscosity and surface tension, and can meet the requirements of ink-jet printing; when the luminous layer of the OLED device is printed by ink jet, the ink has good printing performance and stability, and the performance of the OLED device can be improved.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (10)
1. An ink, comprising: the solvent-based coating comprises a first solvent, a second solvent and a solute, wherein the first solvent is a compound containing phenyl and an ester group, the second solvent is a compound containing phenyl, and the solute is an organic compound.
2. The ink of claim 1, wherein the first solvent is at least one of methyl benzoate, ethyl benzoate, and butyl benzoate.
3. The ink of claim 1, wherein the second solvent is at least one of xylene, chlorobenzene, cyclohexylbenzene, and hexylbenzene.
4. The ink of claim 1, wherein the solute is an organic light emitting material.
5. The ink of claim 4, wherein the solute has a chemical formula of:
6. the ink of any one of claims 1-5, wherein the concentration of the ink ranges from 8mg/mL to 12mg/mL.
7. The ink according to any one of claims 1 to 5, wherein the viscosity of the ink is in the range of 4Pa.s to 10Pa.s.
8. The ink according to any one of claims 1 to 5, wherein the ink has a surface tension in the range of from 28N/m to 40mN/m.
9. An OLED device, comprising:
a substrate;
the first electrode layer is arranged on the substrate;
a second electrode layer disposed opposite to the first electrode layer; and
a light emitting layer between the first electrode layer and the second electrode layer;
wherein the light emitting layer is formed by curing the ink of any one of claims 1 to 8.
10. A display panel comprising the OLED device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627645.9A CN115960491B (en) | 2022-12-16 | 2022-12-16 | Ink, OLED device and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627645.9A CN115960491B (en) | 2022-12-16 | 2022-12-16 | Ink, OLED device and display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115960491A true CN115960491A (en) | 2023-04-14 |
| CN115960491B CN115960491B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211627645.9A Active CN115960491B (en) | 2022-12-16 | 2022-12-16 | Ink, OLED device and display panel |
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